Respiratory mask frame



FIG. 1 is a front perspective view of a portion of a respiratory maskframe showing our design, with the lower portion of the frame with clipreceptacles portrayed in broken lines;

FIG. 2 is a reverse perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a right side view thereof; and

FIG. 8 is a left side view thereof;

FIG. 9 is a front perspective view of a portion of a respiratory maskframe showing an embodiment of our design, with the vent portions andthe lower portion of the frame with clip receptacles portrayed in brokenlines;

FIG. 10 is a reverse perspective view thereof;

FIG. 11 is a front view thereof;

FIG. 12 is a rear view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a bottom view thereof;

FIG. 15 is a right side view thereof; and,

FIG. 16 is a left side view thereof.

Where included, the use of broken lines are for illustrative purposesonly to indicate environmental surroundings and does not constitute aportion of the claimed design.

Where included, the use of dotted lines represents the border betweenclaimed and unclaimed subject matter and does not constitute a portionof the claimed design.

The ornamental design for a respiratory mask frame, as shown and described. 